2931.90.90
Other
Other organo-inorganic compounds: Other: Other
Data provenance: Rates from HTS Revision 16 (Aug 15, 2026); trade measures verified against CBP CSMS and Federal Register notices through Aug 15, 2026.
Duty rates
Column 1 (General / MFN)
3.7%
Column 2 (Non-NTR)
25%
Column 1 (Special / FTA)
Free
Eligible
The rates above are statutory column rates. Trade remedies in Chapter 99 (Section 301, 232, IEEPA, reciprocal) and FTA preferences can change the duty owed on a given entry — see below.
Trade measures (Chapter 99)
9903.90.08
35%
ActiveArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Applies to origin: RU, BY
Effective from April 5, 2025
9903.88.04
LIST_2
The duty provided in the applicable subheading + 25%
ActiveExcept as provided in headings 9903.88.33, 9903.88.34, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(g) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(g)
Applies to origin: CN
Effective from August 23, 2018
Antidumping & countervailing (AD/CVD)
1 active AD/CVD order may apply to this code. Applicability is set by the written scope of each order, not the HTS number alone.
C-570-046
CVD · CN
all-others deposit
1-Hydroxyethylidene-1, 1-Diphosphonic Acid
Applicability is determined by the written scope of the order, not the HTS code alone. An order linked to this code may or may not cover a specific product.
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Other codes in heading 2931
Duty by origin country
The rate above is the statutory base. Total landed duty depends on origin — see the calculated rate for 2931.90.90 from each major US trading partner.
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